Boiler construction



Oct. 4, 1966 M. DE COSIMO BOILER CONSTRUCTION 2 Sheets-Sheet 1 FiledJune 5, 1965 INVENTOR. M'cbae/ fiefaszmo "A FUR/V525.

Oct. 4, 1966 M. DE COSIMO 3,276,435

BOILER CONSTRUCTION Filed June 5. 1965 2 Sheets-Sheet 2 54 INVFNTOR.

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United States Patent 3,276,435 BUILER CONSTRUQTIUN Michael De Cosimo, 9Custer Ave, Yonkers, NY. Filed June 3, 1965, Ser. No. 460,953 7 tilaims.(Cl. 122-149) to pass by for sufficiently cooling the furnace beforeletting a workman enter thereinto for disconnecting the fire tubes fromthe opposite boiler walls to permit their removal. Such practice is timeconsuming, uncomfortably crammed and possibly hot to the workman andpresents an undesirable situation which has long been wanting forimprovement.

Accordingly, it is a principal object of the present invention toprovide an improved fire tube boiler having self-contained means toallow removal of the fire tubes from the boiler without the necessity tocool the furnace for a relatively long period because it does notrequire that a workman enter thereinto for accomplishing the same.

Another object is to provide an improved fire tube boiler wherein theworkman may stand on the outside of the furnace at the front and rearside of the boiler to accomplish the fire tube removal.

Still another object is to provide a fire tube boiler having accessdoors on the opposite front and rear walls of the boiler to permitadmittance to the opposite ends of the fire tubes.

Another object is to provide a fire tube boiler having a rear wall doorhaving self-contained connection means to the chimney flue duct.

Another object is to provide a fire tube boiler having a removable rearWall door which includes a portion of the chimney flue duct and whichwhen removed allows sufficient room for a workman to work unencumberedby objects in his way.

Other objects are to provide a fire tube boiler having the above objectswhich is simple in design, inexpensive to manufacture, rugged inconstruction, easy to service and efficient in operation.

These and other objects will be readily apparent upon a study of thefollowing specification and the accompanying drawings wherein:

FIGURE 1 is a side cross sectional view through a boiler incorporatingthe present invention,

FIG. 2 is a cross sectional view taken on line 2-2 of FIG. 1,

FIG. 3 is a perspective view of the rear wall access door,

FIG. 4 is a cross sectional view taken on line 4-4 of FIG. 3,

FIG. 5 is a perspective exploded view of a modified form of the presentinvention, and

FIG. 6 is a rear elevational view of still another modified form thereofshown partly in opened position.

Referring now to the drawings in detail the numeral 19 represents a firetube boiler according to the present invention wherein there is afurnace l1 surmounted by a boiler element 12. A suitable burner 13 inthe furnace provides a means for furnishing heat within the device.

The boiler element is comprised of a housing 114 having opposite sidewalls 15, a front wall 16, a rear wall 17, and top wall 18 enclosing acentral water or steam chamber 19, across which a plurality ofhorizontal fire tubes 29 extend supported at their opposite ends in thefront and rear walls of the boiler. A plurality of sleeves 21 are firmlysecured in the front and rear walls by means of welding process and thefire tubes are fitted within the sleeves; it being understood that thetubes are of a diametrical dimension equivalent to that of the sleeve soto fit tightly therewithin.

A front door 22 is mounted on the outer side 23 of the front wall 16,the door being positioned to cover the ends of the fire tubes. The frontdoor comprises a panel 24 having a peripheral side wall 25 therearoundto form a chamber 26 therein. A flange 27 on the side wall 25 has aplurality of openings 28 therethrough for receiving bolts 29 secured inthreaded openings in the boiler front wall. Thus the chamber 26 providescommunication between the tube ends.

A rear door 3% is likewise mounted on the outer side 31 of the rear wall17 in a position to cover the rear ends of the fire tubes. The rear dooris comprised (as shown in FIGS. 1, 2, 3 and 4) of a left and right doorelement 32 and 33 respectively.

The boiler element 12 has a horizontal plate 34 forming a bottom wall ofthe water or steam chamber 19. A plurality of openings 35 are madethrough the boiler rear wall 17 at a location below the plate 34, theopenings 35 providing a means for movement of burner flames and beat outof the furnace and subsequently through the boiler as is indicated bythe arrows in FIG. 1 of the drawings.

Each rear door element further covers the openings 35 in a mannersimilar to covering the fire tube ends.

Each rear door element comprises a panel 36 having a side wall 37 partlytherearound. At one corner the side wall is interrupted by asemi-circular chimney flue duct clamp 38. A flange 39 on the side wall37 has openings 40 therethrough to receive bolts 41 secured in threadedopenings 42 in the boiler rear wall 17. A flange 43 on the upper edge ofthe clamp 38 and a Z-sh-aped flange 44 on the lower side of the clampand one edge of panel 36 are provided with openings 45 for receiving abolt 46 used to secure the door elements 32 and 33 together. Nuts 56secure the bolts 46.

An upper track 47 and a lower track 48 made of angle iron welded to theouter side 31 of rear wall 17 provide means for sliding the doorelements horizontally toward and away from each other. The upper andlower edges 49 and 50 respectively of the flange 39 are slidable withinthe tracks.

The two door elements 32 and 33 enclose a lower chamber 51 and an upperchamber 52 separated by an intermediate wall 53 having an asbestosgasket 54 in abutment with the outer side 31 of the boiler wall; thegasket providing a tight seal between the chambers. The lower chamberallows communication between the openings 35 and a lower number of firetubes, whereas the upper chamber provides communication between theupper number of fire tubes and a chimney flue duct 55 leading to chimney56. The clamp 38 clamps around the outer side of the duct 55.

In operative use, when access is desired to remove the fire tubes, thefront door is taken off by removing bolts 29. Likewise the rear doorbolts 41 and 46 are removed, the doors slid apart to expose the oppositeends of the fire tubes.

In FIG. 5, a modified construction is shown wherein rear door includes amain panel 61, peripheral side wall 62, and flange 63 having boltopenings 64. It further includes the lower half of a semi-cylindricalclamp 65 having flange 66 with bolt openings 67. An upper clamp 68 hasflanges 69 with openings 70 therethrough for securement to the flanges66. Clamp 68 also has a flange 71 with openings '72 therein forsecurement to the rear wall of the boiler.

In FIG. 6 another modified rear door 80 is shown wherein door elements81 and 82 each have a panel 83, side walls 84, flange 85 with openings86 therethrough. Each element 81 and 82 has a side semi-cylindricalclamp 87 at their upper end and the elements are pivotally securedtogether by a pin 88 at their lower end. When the elements are pivotedtoward each other the clamps secure around the duct 55 providingconnection between the boiler and chimney.

Thus a novel method has been shown whereby access is provided to bothends of all fire tubes and the duct is out of the way of the workman.

While various changes may be made in the detail construction, it isunderstood that such changes will be in the spirit and scope of thepresent invention as is defined in the appended claims.

What is claimed is:

1. In a fire tube boiler the combination of furnace and boiler element,said furnace having a burner to provide heat means to said boilerelement surmounted on said furnace, said boiler element comprising ahousing having opposite side walls, a front wall, a rear wall, a topwall and a horizontal intermediate wall enclosing a water or steamchamber, a plurality of fire tubes between said front and rear walls, afront door covering the front ends of said fire tubes, and a rear doorcovering the rear ends of said fire tubes, said rear wall having aplurality of openings below said water or steam chamber, said front andrear doors being removable from said boiler to provide access to saidfront and rear ends of said fire tubes, wherein said rear door includesconnection means between said boiler and a chimney flue duct, whereineach rear door comprises a pair of rear door elements, each of said reardoor elements having a clamp member for securement around said chimneyflue duct, each said door element comprising a vertical panel spacedapart by chamber means from said rear wall of said boiler, a side wallpartly around the periphery of said panel, a flange on each side wall ofsaid door element, openings in said flange to receive bolts forsecurement to said rear wall of said boiler, and secondary flanges oneach rear door element for securing said rear door elements together.

2. In a fire tube boiler the combination of a furnace and boilerelement, said furnace having a burner to provide heat means to saidboiler element surmounted on said furnace, said boiler elementcomprising a housing having opposite side Walls, a front wall, a rearwall, a top wall and a horizontal intermediate wall enclosing a water orsteam chamber, a plurality of fire tubes between said front and rearwalls, a front door covering the front ends of said fire tubes, and arear door covering the rear ends of said fire tubes, and a plurality ofopenings in said rear wall below said water or steam chamber, said frontand rear doors being removable from said boiler to provide access tosaid front and rear ends of said fire tubes, wherein said rear doorincludes connection means between said boiler and a chimney flue duct,wherein said rear door comprises a pair of rear door elements, each ofsaid rear door elements having a clamp member for securement around saidchimney flue duct, wherein each said rear door element comprises avertical panel spaced apart by chamber means from said rear wall of saidboiler, a side wall partly around the periphery of said panel, a flangeon each side wall of said door element, openings in said flange toreceive bolts for securement to said rear wall of said boiler, andsecondary flanges on each rear door element for securing said rear doorelements together, wherein each said clamp member comprises asemi-cylindrical member receivable over the outer side of said chimneyflue duct, and said secondary flanges comprising a flange along onestraight edge of said clamp member and a Z-shaped flange along the otherstraight edge of said clamp member and adjacent opposing edges of saidrear door element panels, said secondary flanges of one rear doorelement being in abutment with the secondary flanges of the other reardoor element when said rear door is mounted on said boiler in operativeposition.

3. In a fire tube boiler the combination as set forth in claim 2,wherein each said rear door chamber means comprises a lower chamber andan upper chamber separated by an intermediate wall, and an asbestosgasket along the edge of said intermediate wall for abutment wit-h saidrear wall of said boiler.

4-. In a fire tube boiler the combination as set forth in claim 3,wherein said lower chamber communicates with said rear wall openingsbelow said water and steam chamber and the lower number of fire tubeends, and said upper chamber communicates with the upper number of firetube ends and said chimney flue duct.

5. In a fire tube boiler the combination as set forth in claim 4,wherein said front door comprises a panel, a flange on said side walland openings in said flange for receiving bolts to mount said door onsaid front wall of said boiler, said door enclosing a centralcompartment which communicates with the front ends of said lower numberof fire tubes and the front ends of said upper number of fire tubes.

6. In a fire tube boiler the combination as set forth in claim 5,wherein the upper and lower edges of said rear door elements is slidablyreceived with an upper and lower track respectively, said tracks beingmounted on the said rear wall of said boiler.

7. In a fire tube boiler the combination as set forth in claim 6,wherein said clamp members are at one end of each of said rear doorelements and the opposite end of said rear door elements are pivotallysecured together.

References Qited by the Examiner UNITED STATES PATENTS 1,751,533 3/1930Taylor 12r275 X 2,242,744 5/1941 Close 122-76 X 2,592,216 4/1952 Watts122149 X KENNETH W. SPRAGUE, Plihldl') Examiner.

1. IN A FIRE TUBE BOILER THE COMBINATION OF FURNACE AND BOILER ELEMENT,SAID FURNACE HAVING A BURNER TO PROVIDE HEAT MEANS TO SAID BOILERELEMENT SURMOUNTED ON SAID FURNACE, SAID BOILER ELEMENT COMPRISING AHOUSING HAVING OPPOSITE SIDE WALLS, A FRONT WALL, A REAR WALL, A TOPWALL AND A HORIZONTAL INTERMEDIATE WALL ENCLOSING A WATER OR STEAMCHAMBER, A PLURALITY OF FIRE TUBES BETWEEN SAID FRONT AND REAR WALLS, AFRONT DOOR COVERING THE FRONT ENDS OF SAID FIRE TUBES, AND A REAR DOORCOVERING THE REAR ENDS OF SAID FIRE TUBES, SAID REAR WALL HAVING APLURALITY OF OPENINGS BELOW SAID WATER OR STEAM CHAMBER, SAID FRONT ANDREAR DOOR BEING REMOVABLE FROM SAID BOILER TO PROVIDE ACCESS TO SAIDFRONT AND REAR ENDS OF SAID FIRE TUBES, WHEREIN SAID REAR DOOR INCLUDESCONNECTION MEANS BETWEEN SAID BOILER AND A CHIMNEY FLUT DUCT, WHEREINEACH REAR DOOR COMPRISES A PAIR OF REAR DOOR ELEMENTS, EACH OF SAID REARDOOR ELEMENTS HAVING A CLAMP MEMBER FOR SECUREMENT AROUND SAID CHIMNEYFLUE DUCT, EACH SAID DOOR ELEMENT COMPRISING A VERTICAL PANEL SPACEDAPART BY CHAMBER MEANS FROM SAID REAR WALL OF SAID BOILER, A SIDE WALLPARTLY AROUND THE PERIPHERY OF SAID PANEL, A FLANGE ON EACH SIDE WALL OFSAID DOOR ELEMENT, OPENINGS IN SAID FLANGE TO RECEIVE BOLTS FORSECUREMENT TO SAID REAR WALL OF SAID BOILER, AND SECONDARY FLANGES ONEACH REAR DOOR ELEMENT FOR SECURING SAID REAR DOOR ELEMENTS TOGETHER.